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Functional Properties of Gelatin Extracted from Fish Wastes | ||
| Basrah Journal of Agricultural Sciences | ||
| Article 5, Volume 26, 2 (special Issue), 2013, Pages 72-89 PDF (0 K) | ||
| DOI: 10.33762/bagrs.2013.111665 | ||
| Authors | ||
| Jalal M. E. Al-Noor; A. Y. Al-Dubakel | ||
| Abstract | ||
| Skins of tilapia Tilapia zilli , gas bladders of the common carp Cyprinus carpio L. and heads of barred needle fish Ablennes hians used as raw materials to produce gelatin. Raw materials washed, cut and treated with sodium hydroxide solution 0.2% (1:6 , W:V) for 50 min. at ambient temperature before washing and treating with concentrated sulphuric acid 0.2% (1:6 , W:V) for 50 min. at ambient temperature. After that, it soaked in citric acid 1% (1:6, W: V) for 50 min. at ambient temperature. Gelatin extracted with distilled water (1:2.5 W: V) for 18 hrs at 45◦C. Refinement, filtration and dehydration processes carried out on gelatin solutions which then grinded and packaged to study the functional properties of the product for the three types. The results indicated that the extracted gelatin was of good quality for functional properties especially viscosity, water absorption, fat binding, solubility, ability for gelatin formation as was as foaming properties and emulsification . Viscosity was 1.47 , 1.14 and 1.08 centipoises for bladders gelatin, skin gelatin and heads gelatin respectively at 30◦C at 1% concentration . The ability of water absorption the higher value was for bladder gelatin 1.8 ml/g then decreased to reach 1.4 and 1.2 ml/g for skin gelatin and heads gelatin, respectively. The extracted gelatin had a great ability for oil binding the value reached 2.1 ,2.1 and 1.9 ml /g for skin gelatin, bladder gelatin and heads gelatin, respectively. Solubility reached 87.64 % , 84.28% and 79.25% for bladders gelatin, skin gelatin and heads gelatin , respectively .The gelatin forming was foaming properties was good especially bladder gelatin which reached the highest value for strong gelatin forming at 3% concentration, for foaming size they reached 70 , 54 and 20 ml for the skin gelatin , bladder gelatin and heads gelatin , respectively . | ||
| Keywords | ||
| Gelatin; Functional properties; Fish wastes; Gas bladders | ||
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